Index: sys/ufs/ffs/ffs_alloc.c
===================================================================
--- sys/ufs/ffs/ffs_alloc.c
+++ sys/ufs/ffs/ffs_alloc.c
@@ -3236,8 +3236,7 @@
 		return (EINVAL);
 	}
 	ump = VFSTOUFS(mp);
-	if ((mp->mnt_flag & MNT_RDONLY) &&
-	    ump->um_fsckpid != td->td_proc->p_pid) {
+	if (mp->mnt_flag & MNT_RDONLY) {
 		vn_finished_write(mp);
 		fdrop(fp, td);
 		return (EROFS);
Index: sys/ufs/ffs/ffs_inode.c
===================================================================
--- sys/ufs/ffs/ffs_inode.c
+++ sys/ufs/ffs/ffs_inode.c
@@ -132,7 +132,7 @@
 	if (waitfor)
 		ip->i_flag &= ~(IN_SIZEMOD | IN_IBLKDATA);
 	fs = ITOFS(ip);
-	if (fs->fs_ronly && ITOUMP(ip)->um_fsckpid == 0)
+	if (fs->fs_ronly)
 		return (0);
 	/*
 	 * If we are updating a snapshot and another process is currently
Index: sys/ufs/ffs/ffs_vfsops.c
===================================================================
--- sys/ufs/ffs/ffs_vfsops.c
+++ sys/ufs/ffs/ffs_vfsops.c
@@ -504,14 +504,6 @@
 			return (error);
 		if (fs->fs_ronly &&
 		    !vfs_flagopt(mp->mnt_optnew, "ro", NULL, 0)) {
-			/*
-			 * If we are running a checker, do not allow upgrade.
-			 */
-			if (ump->um_fsckpid > 0) {
-				vfs_mount_error(mp,
-				    "Active checker, cannot upgrade to write");
-				return (EINVAL);
-			}
 			/*
 			 * If upgrade to read-write by non-root, then verify
 			 * that user has necessary permissions on the device.
@@ -1416,7 +1408,7 @@
 	if (MOUNTEDSOFTDEP(mp))
 		softdep_unmount(mp);
 	MPASS(ump->um_softdep == NULL);
-	if (fs->fs_ronly == 0 || ump->um_fsckpid > 0) {
+	if (fs->fs_ronly == 0) {
 		fs->fs_clean = fs->fs_flags & (FS_UNCLEAN|FS_NEEDSFSCK) ? 0 : 1;
 		error = ffs_sbupdate(ump, MNT_WAIT, 0);
 		if (ffs_fsfail_cleanup(ump, error))
@@ -1436,13 +1428,6 @@
 		free (ump->um_trimhash, M_TRIM);
 	}
 	g_topology_lock();
-	if (ump->um_fsckpid > 0) {
-		/*
-		 * Return to normal read-only mode.
-		 */
-		error = g_access(ump->um_cp, 0, -1, 0);
-		ump->um_fsckpid = 0;
-	}
 	g_vfs_close(ump->um_cp);
 	g_topology_unlock();
 	BO_LOCK(&ump->um_odevvp->v_bufobj);
@@ -1706,7 +1691,7 @@
 	suspended = 0;
 	td = curthread;
 	fs = ump->um_fs;
-	if (fs->fs_fmod != 0 && fs->fs_ronly != 0 && ump->um_fsckpid == 0)
+	if (fs->fs_fmod != 0 && fs->fs_ronly != 0)
 		panic("%s: ffs_sync: modification on read-only filesystem",
 		    fs->fs_fsmnt);
 	if (waitfor == MNT_LAZY) {
@@ -2178,7 +2163,7 @@
 	fs = ump->um_fs;
 	if (fs->fs_ronly == 1 &&
 	    (ump->um_mountp->mnt_flag & (MNT_RDONLY | MNT_UPDATE)) !=
-	    (MNT_RDONLY | MNT_UPDATE) && ump->um_fsckpid == 0)
+	    (MNT_RDONLY | MNT_UPDATE))
 		panic("ffs_sbupdate: write read-only filesystem");
 	/*
 	 * We use the superblock's buf to serialize calls to ffs_sbupdate().
Index: sys/ufs/ufs/ufsmount.h
===================================================================
--- sys/ufs/ufs/ufsmount.h
+++ sys/ufs/ufs/ufsmount.h
@@ -82,7 +82,6 @@
  *	i - ufsmount interlock (UFS_LOCK / UFS_UNLOCK)
  *	q - associated quota file is locked
  *	r - ref to parent mount structure is held (vfs_busy / vfs_unbusy)
- *	u - managed by user process fsck_ufs
  */
 struct ufsmount {
 	struct	mount *um_mountp;		/* (r) filesystem vfs struct */
@@ -102,7 +101,6 @@
 	struct	mtx um_lock;			/* (c) Protects ufsmount & fs */
 	struct	sx um_checkpath_lock;		/* (c) Protects ufs_checkpath()
 						       result */
-	pid_t	um_fsckpid;			/* (u) PID can do fsck sysctl */
 	struct	mount_softdeps *um_softdep;	/* (c) softdep mgmt structure */
 	struct	vnode *um_quotas[MAXQUOTAS];	/* (q) pointer to quota files */
 	struct	ucred *um_cred[MAXQUOTAS];	/* (q) quota file access cred */